Potassium peroxide

Potassium peroxide
Names

IUPAC name Potassium peroxide
Identifiers
CAS Number	17014-71-0^Y
3D model (Jmol)	Interactive image
ChemSpider	26237
ECHA InfoCard	100.037.339
EC Number	241-089-8
PubChem	28202
InChI InChI=1S/2K.O2/c;;1-2/q2+1;-2 Key: XXQBEVHPUKOQEO-UHFFFAOYSA-N InChI=1/2K.O2/c;;1-2/q2+1;-2 Key: XXQBEVHPUKOQEO-UHFFFAOYAV
SMILES [O-][O-].[K+].[K+]
Properties
Chemical formula	K₂O₂
Molar mass	110.196 g/mol
Appearance	yellow amorphous solid
Melting point	490 °C (914 °F; 763 K)
Solubility in water	reacts with water^[1]
Structure
Crystal structure	Orthorombic
Space group	Cmca, oS16
Thermochemistry
Std molar entropy (S^o₂₉₈)	113 J·mol⁻¹·K⁻¹^[2]
Std enthalpy of formation (Δ_fH^o₂₉₈)	−496 kJ·mol⁻¹^[2]
Hazards
NFPA 704	0 3 1 OX
Related compounds
Other anions	Potassium oxide Potassium superoxide Potassium chloride
Other cations	Lithium peroxide Sodium peroxide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Y verify (what is ^YN ?)
Infobox references

Potassium peroxide is an inorganic compound with the molecular formula K₂O₂. It is formed as potassium reacts with oxygen in the air, along with potassium oxide (K₂O) and potassium superoxide (KO₂).

Potassium peroxide reacts with water to form potassium hydroxide and oxygen:

2 K₂O₂ + 2 H₂O → 4 KOH + O₂

References

↑ Lide, David R. (1998). Handbook of Chemistry and Physics (87 ed.). Boca Raton, FL: CRC Press. pp. 477; 520. ISBN 0-8493-0594-2.
1 2 Zumdahl, Steven S. (2009). Chemical Principles 6th Ed. Houghton Mifflin Company. p. A22. ISBN 0-618-94690-X.

Potassium compounds

Oxygen compounds

AgO Al₂O₃ AmO₂ Am₂O₃ As₂O₃ As₂O₅ Au₂O₃ B₂O₃ BaO BeO Bi₂O₃ BiO₂ Bi₂O₅ BrO₂ Br₂O₃ Br₂O₅ CO CO₂ C₂O₃ CaO CaO₂ CdO CeO₂ Ce₂O₃ ClO₂ Cl₂O Cl₂O₃ Cl₂O₄ Cl₂O₆ Cl₂O₇ CoO Co₂O₃ Co₃O₄ CrO₃ Cr₂O₃ Cr₂O₅ Cr₅O₁₂ CsO₂ Cs₂O₃ CuO D₂O Dy₂O₃ Er₂O₃ Eu₂O₃ F₂O F₂O₂ F₂O₄ FeO Fe₂O₃ Fe₃O₄ Ga₂O Ga₂O₃ GeO GeO₂ H₂O H₂¹⁸O H₂O₂ HfO₂ HgO Hg₂O Ho₂O₃ I₂O₄ I₂O₅ I₂O₆ I₄O₉ In₂O₃ InO₂ KO₂ K₂O₂ La₂O₃ Li₂O Li₂O₂ Lu₂O₃ MgO Mg₂O₃ MnO MnO₂ Mn₂O₃ Mn₂O₇ MoO₂ MoO₃ Mo₂O₃ NO NO₂ N₂O N₂O₃ N₂O₄ N₂O₅ NaO₂ Na₂O Na₂O₂ NbO NbO₂ Nd₂O₃

Chemical formulas

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